P0909Gate Select Control Error
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Set when the control module of an automated manual gearbox commands the select actuator to a new gate, but the measured select position does not reach the target within the allowed time and tolerance. Sensor and actuator circuits may be electrically fine; the fault lies in the closed loop as a whole. Typical reasons are a jammed or stiff select shaft or shift head, a worn or weak select motor, or a sensor offset. No manufacturer documents this code publicly. An Aisin AI patent describes select control with target and actual gates, and a Hyundai/Kia patent detects jammed or stuck shift actuators from motor current. CARB requires functional checks on such outputs. P0910 to P0913 are the actuator circuit faults, P0919 the same error in the shift direction. The gearbox may refuse gears or stay in neutral.
- What you may notice
- Check engine or transmission warning light on
- Certain gears cannot be engaged or gearbox stays in neutral
- Clicking or whirring from the actuator without a gear change
- Likely causes
- LikelyStiff or jammed select shaft, shift head or internal selector mechanism
- PossibleWorn select motor (brushes, gears) with too little force
- PossibleSelect sensor offset or gate positions not relearned
- RareWeak battery or voltage drop on the actuator supply
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.